precision signal generator for versatile waveform generation. It can output sine waves, triangular waves, and square waves with a frequency range from 1 Hz to 1 MHz and adjustable amplitude for flexible signal testing. Five accuracy resolution for precise tuning. Frequency control includes five accuracy settings with coarse and fine adjustments, enabling accurate and repeatable signal generation across the full range. Flexible power options for different setups. Power it from a 912 V external power supply or from a 9 V battery, allowing both stationary use in a lab and portable operation in the field. Easy installation and debugging. Designed with a small component count and capability for direct insertion, simplifying assembly, setup, and troubleshooting. Compact, DIYfriendly design. Built for straightforward construction and reliable performance, suitable for hobbyists, educational projects, and quick prototypes. Practical use scenarios Circuit testing and signal analysis. Generate test signals to evaluate filters, amplifiers, and signal paths in analog circuits or RF work, and observe waveform behavior across the frequency spectrum. Microcontroller and ADC/DAC development. Provide accurate test waveforms for validating ADC inputs, DAC outputs, PWM signals, and timing in microcontroller projects, helping calibrate and verify performance. Education and demonstrations. Demonstrate waveform concepts, frequency response, and signal integrity in classroom or lab environments, facilitating handson learning and experiments.